Arrange in order of highest to lowest correlation of IQ among various types of children:

(A) Identical twins reared together
(B) Identical twins reared apart
(C) Fraternal twins reared together
(D) Siblings reared apart

Choose the correct answer from the options given below:

(A), (B), (C), (D)

The correct answer is Option (4) → (A), (B), (C), (D)

(A) Identical twins reared together
(B) Identical twins reared apart
(C) Fraternal twins reared together
(D) Siblings reared apart

The intelligence of identical twins reared together correlate almost 0.90. Twins separated early in childhood also show considerable similarity in their intellectual, personality and behavioural characteristics. The intelligence of identical twins reared in different environments correlate 0.72, those of fraternal twins reared together correlate almost 0.60, and those of brothers and sisters reared together correlate about 0.50, while siblings reared apart correlate about 0.25.